SNAKES. 69 



occipital shield rather larger than the vertebral ; fourth upper labial 

 large under the eyes. 



a. In spirits. Adult. Tropical America. 



b. In spirits. Adult. Tropical America. From Parreyss' collection, 



Vienna. 



" Uranops angulatus,' Parreyss. 



c. In spirits. Young. Pale olive, with numerous broad lozenge- 



shaped cross-bands, the narrow part fonning a rather irregular 

 line across the belly. Tropical America. Presented by the 

 Koyal College of Surgeons. ^ 



21. Tachyxectes. 



Head moderate, depressed : frontals 3 ; anterior triangular, 

 advanced between the nasals : eyes very small : scales ovate, trun- 

 cated, strongly keeled : tail elongate. 



Tachynectes, Fitz. Si/st. Kept. 25, 1843, no character. 



1. The Tachynectes. Tachynectes Leopardina, Fitz. Syst. 

 Rept. 25, 1843. Dimades Leopardina, Gray^ Zool. Misc. 65. Ho- 

 malopsis Leopardina, Schlegel, Phys. Serp. 359, 6b. 



Red-brown, with five rows of darker spots placed in quincunx ; 

 paler beneath, with alternate darker spots : a pale streak from each 

 eye, united behind, fonning a collar. 



Inhab. ? Mus. Leyden. 



22. Tropidophis. 



Head rather depressed ; crown shielded ; occipital shields 

 large : nostrils sublateral, on the upper edge of a single shield, with 

 a groove beneath it : one high anterior and three posterior equal 

 oculars : loreal single : labial shields moderate, uniform ; fourth 

 and fifth forming part of the orbit; hinder larger, undivided : eyes 

 large, sublateral : body fusiform : scales keeled, ovate, and longitu- 

 dinally striated : tail short, conical. 



Like Tropidonotus, but anterior frontal and nasal shield single. 



Tropidonotus sp., Schlegel, Phys. Serp. 



1. The Chittee. Tropidophis Schistosus. Chittee, Russell, 

 Ind. Serp. ii. t. 4. Coluber Schistosus, Daud. Rept. vii. 132. 3Ier- 

 rem, Tent. 103. Tropidonotus Schistosus, Schlegel., Phys. Serp. 

 319, n. 13. Tropid. msestus, Cantor.^ Zool. Soc. 1838, 54 ? 



